<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>v-bind和v-for的结合</title>
    <style>
      .active {
        color: red;
      }
    </style>
  </head>
  <body>
    <div id="app">
      <ul>
        <li
          v-for="(m,index) in city"
          @click="clickCity(index)"
          :class="{active:index==selectindex}"
        >
          {{m}}
        </li>
      </ul>
    </div>
    <!-- 开发环境版本，包含了有帮助的命令行警告 -->
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
    <script>
      const app = new Vue({
        el: "#app",
        data: {
          city: ["北京", "上海", "杭州", "武汉", "广州"],
          selectindex: 0,
        },
        methods: {
          clickCity: function (index) {
            this.selectindex = index;
          },
        },
      });
    </script>
  </body>
</html>
